Table 2

Multiple regression analysis
Variable (reference category) Variable categories Regression coefficient 0.95 Confidence interval for regression coefficient p-value
Lower bound Upper bound
Constant/baseline – showing the effect of the reference categories NA 93.4 76.7 110.1
Estrogen administration mode (Slow-release pellets) Injections -31.9 -48.5 -15.2 0.000
Silastic capsules -38.2 -54.9 -21.6 0.000
Per oral -59.3 -129.3 10.7 0.096
Type of middle cerebral artery occlusion procedure (Intraluminal filament) Direct, mechanical 33.2 18.8 47.6 0.000
Embolic -42.0 -90.8 6.7 0.091
Photothrombotic 20.6 -53.1 94.2 0.581
Endothelin injection 2.3 -31.2 35.9 0.891
Laser-doppler flowmetry during surgery (No) [Yes] -15.3 -29.4 -1.2 0.034
Edema correction (No edema correction used) Correcting for edema in infarct -21.8 -54.2 10.6 0.184
Correcting for edema in entire hemisphere -23.1 -39.6 -6.7 0.006
Length of time between initiation of estrogen administration and induction of the ischemic damage Continuous; hours 0.025 0.011 0.040 0.001

Variables excluded in preceding multiple regression analysis (with backward exclusion) due to too low explanatory value: Strain, Sex, Elderly rats, Washout (Length of time between ovariectomy and estrogen administration), Occlusion duration, Length of time between ischemia and evaluation of damage.

Ström and Ingberg

Ström and Ingberg BMC Neuroscience 2014 15:22   doi:10.1186/1471-2202-15-22

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